United States

Aconite

Aconitum napellus

Critically Endangered

Admiralty Island Meadow Vole (Admiraltiae)

Microtus pennsylvanicus

Agrimony

Agrimonia eupatoria

Ajuga

Ajuga reptans

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Small Grass Fly

Lonchoptera bifurcata

Smallhead clover

Trifolium microcephalum

Small hive beetle

Aethina tumida

Small-leaf climbing fern

Lygodium microphyllum

Small-leaf spiderwort

Tradescantia fluminensis

Small lobster claw

Heliconia stricta

small macewort

Mannia pilosa

Small minute scavenger beetle

Latridius minutus

small mousetail moss

Myurella julacea

small notchwort

Lophozia ascendens

Small Phoenix

Ecliptopera silaceata

Small Pond-Lily

Nuphar microphylla

Small Purple-Barred

Phytometra viridaria

small ranunculus

Hecatera dysodea

Small red-belted clearwing

Synanthedon myopaeformis

small red peat moss

Sphagnum capillifolium

small rivulet

Perizoma alchemillata

small scabious

Scabiosa columbaria

Small shell ginger

Alpinia mutica

small skipper

Thymelicus sylvestris

small spruce-bud scale

Physokermes hemicryphus

Small Stagshorn

Calocera cornea

small staircase cone

Propebela turricula

Data Deficient

Small Tabby

Aglossa caprealis

Small-tailed worm

Bimastos eiseni

small twisted moss

Tortella humilis

Small Waterwort

Elatine minima

Small White Aster

Symphyotrichum racemosum

Small white clover

Trifolium nigrescens

Small yellow balsam

Impatiens parviflora

Small Yellow Foxglove

Digitalis lutea

Smelly wallflower

Erysimum odoratum

Smith'S Bulrush

Schoenoplectiella smithii

Smith's Longspur

Calcarius pictus

Smokebush

Buddleja madagascariensis

Smoked Oysterling

Resupinatus applicatus

Smokey-Eyed Boulder Lichen

Porpidia albocaerulescens

Smoky Bracket

Bjerkandera adusta

Smoky Crottle

Parmelia omphalodes

Smoky Rim Lichen

Lecanora cenisia

Data Deficient

smoky shrew

Sorex fumeus

Smoky Spindles

Clavaria fumosa

Smoky-Winged Woodlouse-Fly

Melanophora roralis

Smooth Axil-Bristle Lichen

Myelochroa galbina

Smooth Bristle Bracket

Phellinus laevigatus

Smooth Chanterelle

Cantharellus lateritius

Smooth chastetree

Vitex glabrata

Smooth Clad Lichen

Cladonia gracilis

smoother rupture-wort

Herniaria glabra

Smooth-Footed Powderhorn

Cladonia ochrochlora

Smooth hawksbeard

Crepis capillaris

Smooth honeytree

Casearia nitida

Smooth Hornwort

Phaeoceros laevis

Smoothish-Stemmed Bolete

Hemileccinum subglabripes

Smooth joyweed

Alternanthera paronychioides

Smooth Lungwort

Ricasolia quercizans

Smooth Map Lichen

Rhizocarpon hochstetteri

Smooth mesquite

Prosopis laevigata

Smooth Pox Lichen

Pyrenula laevigata

Extinct

Smooth rattlebox

Crotalaria pallida